Method and apparatus to control a continuously variable transmission
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United States of America Patent
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Jul 16, 2019
Grant Date -
May 18, 2017
app pub date -
Nov 18, 2015
filing date -
Nov 18, 2015
priority date (Note) -
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Abstract
A continuously variable transmission (CVT) including a hydraulically-controllable variator is described. A method for controlling the CVT includes detecting a transient event causing a commanded change in a speed ratio of the variator and disabling feedback control of hydraulic pressure to the variator during the transient event. A target pressure that achieves the commanded change in the speed ratio of the variator is determined, and a pressure trajectory is determined based upon the target pressure. A feed-forward control of the hydraulic pressure to the variator is executed in response to the pressure trajectory during the transient event.
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